Pneumatic-organ



UNITED STATES PATENT OFFICE.

MELVILLE CLARK, OF CHICAGO, ILLINOIS.

PN EU MAfTIC-*ORGAN.

SPECIFICATION forming part of Letters Patent No. 626,320, dated June 6, 1899.

Application led J'une 4,1898. Serial No. 682,561. (N0 model.)

To all whom it may con/cern,.-

Beit known that I, MELVILLE CLARK, a citizen of the United States, residing at Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Pneumatic-'O rgans,which are fully set forth in the following specification, reference being had to the accompanying drawings, forming a part thereof.

In the drawings, Figure l is a vertical foreand-aft section through the wind-chest, reedblock, and pneum atics of an organ having my improvements. Fig. 2 is a detail section in a similar plane, showing a modification in respect to a certain feature. Fig. 3 is a section at the plane of the line 3 3 on an enlarged scale. Fig. fl is a detail section at the plane of the line 4 et on Fig. l.

This invention is designed to effect an increase in the promptness of response of a pneumaticall y-operated reed-valve and adapt it to respond to very light tension in the reedchest, which operates both the sound-producin g devices and the val ve-operatin g pneumatics.

It consists in providing a supplementary pneumatic which operates contrary to the valve-actuatin g or motor pneumatic,with the result that in case ofa motor-pneu matic,which acts positively in one direction when put into communication with the wind-chest and reacts in the other direction merely by relief from the influence of the wind-chest, the reedvalve shall give a positive action in such opposite direction by means of the supplementary pneumatic, and to this end it involves providing such supplementary pneumatic with communication with the windchest,con trolled so as to be opposite that of the motorpneumatic-controlling valve-that is to say, so that the supplementary pneumatic is eX- posed to the infiuence of the wind-chest when the motor-pneumatic is relieved from that iniiuence and is relieved when the motorpneumatic is exposed. By this means both movements of the reed-valve are controlled by the direct influence of the wind-chest `and may be made equally prompt and positive.

A represents a vertical wind-chest, such as I have shown in my various former patents.

B is a block containing the reed-chambers B B B', with their appropriate reeds and communicating by their throats B2 B2 B2 with the wind-chest,into which their openings are controlled by mutes C C C.

D is the reed-valve,which seats at the outer ends of the reed-chambers. It is formed as the moving wall of the motor-pneumatic D'. This motor-pneumatic is controlled in its action by a primary pneumatic E, which actuatesy the oppositcly-seating valves E E2 to control the communications of the motor-pneumatic through the ducts d d2 d3 with the windchest and with the outer air. In the construction shown in Fig. l there is a wind-chest anneX or supplemental chamber A', which eX- tends across in front of the main chamber A and communicates with the latter by the hollow bracket-arms A10 A10, by which it is also supported on the main Wind-chest.

F is a supplementary pneumatic, Which is mounted on the outer side of the back D3 of the motor-pneumatic D and is controlled by valves G G2, which are connected and actuated by the primary pneumatic E and seat at opposite ends of the port g, which is formed in the wall of the supplemental chamber A' and connected by a duct g' g2 g3 with said supplemental pneumatic. The action of the two pairs of valves E E2 and G G2,vvhich are actuated by the same primary pneumatic E, is opposite-t-hat is to say, the expanding movement, which seats the valve E' and unseats the valve E2, thereby putting the motorpneumatic in communication with the windehest and cutting olf its communication with the outer air, seats the valve G2 and unseats the valve G', thereby opening communication of the supplementary pneumatic F with the outer air and cutting 'off its communication with the wind-chest. The collapsingmovement of the primary pneumatic, reversing both valves,leaves them again oppositcly related to thel pneumatics which they respectively control. The moving wall of the supplementary pneumatic -F is connected bya link F2 to the reed-valve D, so that the in tlation of the supplementary pneumatic tends to unseat said valve, while the inflation of the motor-pneumatic tends to seat it. The relative position in which I have shown the various parts in the drawings is that which would obtain in case of a blast-organ-that is, one in which the air is under compression in the Wind- IOO chest. In such case the primary pneumatic, being in communication with the 'Winde-:chest and being infiated and not being vented,

either byfthe uncovering of the port in the.

tracker-range, to which the duct e leads, nor

by the uncovering of the port of the duct e', which is closed by a valve 610, adapted to be operated by a manual-key, the motorpneumatic is iniiated by communication with the Wind-chest, the valve E2 being open, and the supplementary pneumatic is deiiated, in communication with the outer air, because the valve G is open. Upon the venting of the primary pneumatic by the uncoveringircf an aperture of the tracker-range or by the actin of a manual-key the primary pneumatic is'collapsed, the valve E2 seated, E opened,

G seated,YV and G? opened,whereby the motorv pneumatic is ventedthat is, put inte communication with the outer air-at the? same instant that the supplementary pneumatic is inflated by being cut ott from the Aouter air and put into rcommunication with t-he windch'est. Thus at the same instant that the motor-pneumatic ceases to press the valve D on its seat the supplementary pneumatic operates 'positively to pull it o'ii its seat; The

prompt action thus produced is equaled'by the prompt action in the other direction,

pneumatic.

pnenm atic.

lever connection between the primary pneumatic and `either pair of valves-as, for example, the valves G G. This being: done,

the supplementarychambermaybe'dispensed with, and both valves maybe located in precisely similar manner at opposite sidescf the Such construction is shown in Fig. 2, wherein a levier H, y

Wall of the Vmain wind-chest.

fulc-rumed at h and pivotally connected at h' te the oscillating wall of the primary pneumatic, carries at its opposite end the valves G" G2, which control the port in the wall of the main wind-chest, which, with its ducts leading to the supplementary pneumatic, operate precisely as the ports g and ducts g' g2 g3, and are denoted by the letters q, q', q2,

'and qs, respectively.

The back D3 or" the motor-pneumatic, 'on which the supplementary pneumatic is also mounted, is hinged to the rib extension A5 of lthe forward wall of the wind-chest, and the ducts d3 and g3 in the back D3 register, re-- spectively, with the ducts cl2 and g2 in lthe rib when the back is in operative position, with its edge abutting against the; edge of the rib, at which suitable surface is provided to make an air-tight joint and prevent leakage from theducts. This constructionisidenticalwith that 'which is shown in my application, Serial No. 681,468, filed May 23, 1898, except that in that application, there being no supplementary pneumatic, the ducts pertaining to it are not required; but in the present construction, as in the constructicn of that application, the back D3, being released at the forward edge, may be folded back at the hinged edge to give access tothe reed-chambers.

I claim- 1. In a,pneumatically-operated musical instrument,in combination Withthevalve which controls tfhe-sounding'devices; a motor-pneumatic which operates such valve; a supplementary pneumatic adaptedto -operate the valve in the opposite direction from the mo-v tor-pneumatic; a primary pneumatic which controls both the motorpneumatic and the supplementary pneumatic; the valves which effect such control arranged to be actuated by keach action Yof 'the primary pneumatic opposi-tely with respect to the motor and supplementary pneumatics which theyY respectively control; whereby the motor-pneumatic is rendered active when thesupplementary pneumatic is rendered inactive, and the supplementary pneumatic is rendered inactive Ywhen the motor-pneumatic is active.

2. In a pneumatically-opeated organ, in combination with the wind-chestand the reedchamber exterior thereto, an exterior valve which controls such reed-chamber; a motorpneu'm'a'tic exterior to the wind-chest con- :structed and arranged to operate the reed- '..valves respectively; a duct leading from the motor-pneumatic in an outer wall of the windchest to two terminals, one opening into the wind-chest and `the other opening to the outer air; valves which control said terminals respectively, and a primary pneumatic which operates such valves; a supplemental chamber or annex to the wind-chest having anouter wall facing an outer wall of the main chamber of the Wind-chest; a duct in the wall of such supplemental chamber, and a Supplementary pneumatic to which such duct leads, such duct having two terminals, one opening into the supplemental chamber and the other opening to the outer air, and valves which control said openings respectively connected to-and operated by the primary pneumatic.

In testimony whereof I have hereunto set my hand, in the presence of two witnesses, at Chicago, Illinois, this 2d day of June, 1898.

MELVILLE CLARK. Witnesses:

OHAs. S. BURTON, JEAN ELLIOTT. 

